Texas Rangers left-hander Derek Holland is outgoing, fun and a bit of a goofball, but he plans to get a bit more serious this season after a disappointing 2012 campaign.

“It's less of the interviews and those kinds of things," Holland told the Fort Worth Star-Telegram. "It's taking a different approach to it, just carrying myself a little bit better. I'm still going to be the same guy I was before, just with more of a serious approach, turning things down, keeping more of my focus on the field."

After going 16-5 with a 3.95 ERA in 32 starts in 2011, Holland was 12-7 with a 4.67 ERA in 29 games (27 starts) in 2012. Taking a toll on last season’s performance were a shoulder issue and a stomach virus that caused him to lose about 15 pounds.

Holland is well known for his mustache, his Harry Caray impersonations and his Twitter humor, but the Star-Telegram notes he also is among the team’s hardest workers in the gym and spends much time studying video.

"I don't want people saying, 'Oh, that's why he's not pitching well because he out doing this,' ” he told the newspaper. "That's not what it comes down to. There's a lot of work that people don't see, and they want to judge on what they do see. It's upsetting."